Swivel for traveling blocks



Jan. 2, 1923. 1,44L179. 1. H. SCHU'MACHER ET AL.

SWVEL FOR TRAVELING BLOCKS.

`FILED N0v.9, 192|.

Patented Jan. 2, 1923.

Y Starte innata JAMES `n. ysenUMAoHnn Ann Hnivnvr. scannen, or Lone Bienen, oanrronnrn.

swrvnn ron rnnvnnrne Brioorrs. i

Application mea November 9, 192.1.,y semi No. tienen' all 'whom ci?? may concern.' i

Be it known that' we, JAMES H. SCHU MACHER and HENRY P. Sonnnomcitizens of the United States, residing at Long Beach, in the county of Los Angeles and lState of Galifornia, have invented 'new and useful lm'- provements in Swivels for Traveling Blocks, of which the following is a specification.

Our invention relates to swivels, and more particularly to .swivels designed for connecting the rigging of a well drilling mechar nism to the drill cable.

A purpose of ourinvention is la provision of a swivel of the above described character which is normally locked against rotation' the drilling of wells.

l/Ve will describe one form of swivel embodying our invention and will then point out the novel features thereof in claims. ln the. accompanying drawings, Figure 1 is a view showing in edge elevation one form of swivel embodying our invention. v

Fig. 2 is a view showing in side elevation,

, and particularly in section, the swivel shown in Fig. 1. y

Referring specifically to the drawings, in which similar. reference characters refer to similarparts, our invention, in its present embodiment, comprises ya yoke portion K including parallel arms 15 connected by ini` termediate head portions 16. mediate portion is bored to receive a stub shaft 17 formed on thev lower end with an eye or loop portion 18. The lower end of the stub shaft is provided with a reduced'extension 19, and from this extension projects a threaded portion 2() ladapted to receive a nut 21 locked thereon by cotter pin 22. This nut is designed to retain washers 23 upon the extension 19 and which have their confronting faces grooved to provide race ways to receive ball bearings 24. By this arrangement it will be seen that the yoke as it the junction of the stub axle 1'? and they loop 18, a shoulderf25 is provided for limiting the downward movement of the stub axle within the bore 17 of the intermediate tension of the spring 29 to withdrawlthe lu This interek portion 16. AAdjacent this shoulder 25 a-pivot ear 26 is formed `inwhich is mounted pintle 27, and pivotally sustained on the rpintle-is a bifurcatedend of a lever 28. @ne end of a vcoil, spring 29 is fixed to the pintle 27, while the opposite end extends' into a a pair ofidiametrically arranged recesses 31 formed in the intermediate portion 1G orthe yoke` K. rlhe free end ofthe lever is'provided with an eye 32r by means of which an operating ropeor cablejcan be attached for swinging the lever' outwardlyagainst the" (Y 30 fromeither of the recesses 31. i *n In the operation 'of the swivel, it will be 'understood that the# spring 29 normally urges the lever 28 to the position shown in the drawings so that the lug 30 engages within one of the recesses 31. With the lever so positioned, the yoke l is locked against rotation upon the stub axle 17. This yoke is adapted to be connected through the medium of terminal ears to a block of a drill support-ing cable,-while the loop 18 is connected to the block and tackle of therigging. lViiththe swivel so arranged it will be clear thatlwith the lever in locking position, the yoke cannot ybe rotated so that the drill `cable is held so that it moves with the rigging., However, when. the lever is swung upwardly so as to withdraw the lug 30 from the recess, the yoke can nowy freely rotateabout the stub shaft, so that should the drill rope or rigging become twisted to such an extent as to prevent the proper operation of the mechanism, the rotation of the yoke rwill permit of the `untwisting of the cables.

Although we have herein shown and described only one form of swivel embodying our invention, itis to be understood that various changes and modifications may be lmade herein without departing from the spirit of the invention and the spirit and scope of the appendedl claims. f

YVhatwe claim is: n 1. A swivel comprising a loop portion, a yoke rotatably mounted on the loop portion, and pivoted means normally acting to lock the yoke against rotation but movable to a nonlocking position wherein rotation of the yoke is permitted.

2. A swivel comprising a stub axle, a

loop sustained on the stub axle, a yoke rota-y i loop sustained on the stub axle, a yoke rotatably mounted on the stub axle and having recesses formed therein, a lever pivotally sustained adjacent the loop, a lug` formed on the lever and engageable with any of said recesses ,for locking the yoke against rotation upon the stub axle, said lever being normally urged to a position-wherein said lug engages one ofthe recesses but movable to withdraw the lug from the recess to allow rotation of the yoke.

1l. A swivel comprising a stub axle, a yoke rotatably mounted on the stub axle, a loop formed integral lwith the stub axle, recesses formed on the yoke, a pintle sustained on the loop, a lever pivotally supported on the pintle, a lug carried by the lever and engageable with any one of said recesses, a spring connecting said lever and pintle to normally urge the lever to a position wherein said lug` engages within one of said recesses, and an eye formed in the free end of the lever to permit oi' the connection of a flexible element thereto for swinging the lever to a position wherein said lug` is released or withdrawn from said recesses.

5. A swivel comprising a stub axle, a yoke rotatable on the axle, and a lug pivotally sustained o n the axle and engageable with the yoke at various points to lock the latter in various adjusted positions on the axle. n i

6. A swivel comprising` a loop portion, a

yoke rotatably mounted on the loop portion, l

and means for looking the yoke against ro tation without disturbing` the relative longitudinal positions of the loop portion and yoke. t

7. A swivel comprising a supporting mem* ber, a yoke associated with the member to only rotate thereon,k and means movable to lock the yoke Aagainst rotation or to occupy a non-locking position in whichy rotation oil the yoke is permitted.

In testimony whereof we have signed our I names to this specification.

.niMns n. soHUMAoHER. HENRY r. soANLoN. 

